Landsat 8: Band by Band


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When we investigate land cover using the instruments aboard Landsat satellites we collect sets of data for different wavelengths Some are in the infrared and others correspond to blue green and red visible light We can combine any three of the images to create different depictions of Earth surface What you seeing now is a Landsat image of Florida made with data from the blue green and red visible wavelengths We call this a natural color image because it looks approximately what we would see with our naked eye if we flew far above Florida But we could choose data from other wavelengths and map them to blue green and red colors to highlight different features of the land surface With this particular depiction of the multi spectral data for example we can see much greater contrast between trees and shrubs and sawgrass marsh than was apparent in the natural color image We call certain combinations of wavelengths false color images because they do not replicate what we see with the naked eye Yet they allow us to create images where we can highlight or enhance different surface features The following depiction approximates the type of image that you can